A search for the transit of HD 168443b: improved orbital parameters and photometry
Article
Article Title | A search for the transit of HD 168443b: improved orbital parameters and photometry |
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ERA Journal ID | 1057 |
Article Category | Article |
Authors | Pilyavsky, Genady (Author), Mahadevan, Suvrath (Author), Kane, Stephen R. (Author), Howard, Andrew W. (Author), Ciardi, David R. (Author), De Pree, Chris (Author), Dragomir, Diana (Author), Fischer, Debra (Author), Henry, Gregory W. (Author), Jensen, Eric L. N. (Author), Laughlin, Gregory (Author), Marlowe, Hannah (Author), Rabus, Markus (Author), von Braun, Kaspar (Author), Wright, Jason T. (Author) and Wang, Xuesong X. (Author) |
Journal Title | The Astrophysical Journal: an international review of astronomy and astronomical physics |
Journal Citation | 743 (2), pp. 162-169 |
Article Number | 162 |
Number of Pages | 8 |
Year | 2011 |
Publisher | IOP Publishing |
Place of Publication | United States |
ISSN | 0004-637X |
1538-4357 | |
Digital Object Identifier (DOI) | https://doi.org/10.1088/0004-637X/743/2/162 |
Web Address (URL) | http://iopscience.iop.org/article/10.1088/0004-637X/743/2/162 |
Abstract | The discovery of transiting planets around bright stars holds the potential to greatly enhance our understanding of planetary atmospheres. In this work we present the search for transits of HD 168443b, a massive planet orbiting the bright star HD 168443 (V = 6.92) with a period of 58.11 days. The high eccentricity of the planetary orbit (e = 0.53) significantly enhances the a priori transit probability beyond that expected for a circular orbit, making HD 168443 a candidate for our ongoing Transit Ephemeris Refinement and Monitoring Survey. Using additional radial velocities from Keck High Resolution Echelle Spectrometer, we refined the orbital parameters of this multi-planet system and derived a new transit ephemeris for HD 168443b. The reduced uncertainties in the transit window make a photometric transit search practicable. Photometric observations acquired during predicted transit windows were obtained on three nights. Cerro Tololo Inter-American Observatory 1.0m photometry acquired on 2010 September 7 had the required precision to detect a transit but fell just outside of our final transit window. Nightly photometry from the T8 0.8m automated photometric telescope at Fairborn Observatory, acquired over a span of 109 nights, demonstrates that HD 168443 is constant on a timescale of weeks. Higher-cadence photometry on 2011 April 28 and June 25 shows no evidence of a transit. We are able to rule out a non-grazing transit of HD 168443b. |
Keywords | planetary systems; individual stars (HD 168443); photometric techniques; radial velocities; |
Contains Sensitive Content | Contains sensitive content |
ANZSRC Field of Research 2020 | 510109. Stellar astronomy and planetary systems |
519999. Other physical sciences not elsewhere classified | |
Public Notes | For access to this article, please click on the URL link provided. |
Byline Affiliations | Pennsylvania State University, United States |
California Institute of Technology (Caltech), United States | |
University of California, United States | |
National Aeronautics and Space Administration (NASA), United States | |
Agnes Scott College, United States | |
University of British Columbia, Canada | |
Massey University, New Zealand | |
Tennessee State University, United States | |
Swarthmore College, United States | |
Pontifical Catholic University of Chile, Chile | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q432w/a-search-for-the-transit-of-hd-168443b-improved-orbital-parameters-and-photometry
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